#!/usr/bin/perl

use strict;
use warnings;

use YAML;
use Getopt::Std;

$ARGV[0] || die "no yaml file specified";

my $count = 0;

sub build_attempt {
    my $r = system "./jhc -L. --build-hl $ARGV[0] --deps tmp/deps$$.yaml --stop typecheck";
    #my $r = system "./jhc -L. --build-hl $ARGV[0] --deps tmp/deps$$.yaml";
    if (!$r) {
        if(++$count == 5) {
            my $r = system "./jhc -L. --build-hl $ARGV[0] --deps tmp/deps$$.yaml";
            $count = 0;
        }
    }
    return !$r;
}

build_attempt || die "unable to build initial hl";
my $y = YAML::LoadFile("tmp/deps$$.yaml") or die "can't load tmp/deps$$.yaml file";

my @deps = values %{$y->{ModuleSource}};

foreach my $fn (@deps) {
    print "processing $fn\n";
    open my $fh, "<$fn" or die "$!: $fn";
    my @lines = <$fh>;
    close $fh or die "$!: close $fn";
    my @imports = grep { !/\(\)/ } grep { /^import / } @lines;
    next unless @imports;
    foreach my $i (@imports) {
        my $s = $i;
        chomp $s;
        print " trying $s\n";
        open my $fh, ">$fn.deptest" or die "$!: $fn.deptest";
        foreach (@lines) {
            if ($_ eq $i) {
                $_ = "-- CI $i";
            }
            print $fh $_;
        }
        close $fh or die "$!: close $fn.deptest";
        rename "$fn.deptest", $fn or die "$!: rename $fn.deptest, $fn";
        if (!build_attempt()) {
            open my $fh, ">$fn.deptest" or die "$!: $fn.deptest";
            foreach (@lines) {
                if ($_ eq "-- CI $i") {
                    $_ = $i;
                }
                print $fh $_;
            }
            close $fh or die "$!: close $fn.deptest";
            rename "$fn.deptest", $fn or die "$!: rename $fn.deptest, $fn";
        }
    }
}